/********************************************/
/*   空调控制系统  
/*   张颂   陈丹升
/*      v1.9
/*   2007.9.14
/*********************************************/

#include"reg51.h"
#include<absacc.h>
#define uchar unsigned char 
#define uint unsigned int
#define compressor_delay_s 30   //定义压缩机延时时间(0-255s)
#define dis_en_delay_set    6   //定义按键按下时 led显示时间   
#define AD_CH0 XBYTE[0xBf00]    //P2.6=0   in0

sbit fan_h = P1^0; 
sbit fan_m = P1^1;
sbit fan_l = P1^2;
sbit compressor_on = P1^3;
sbit ext_room_fan  = P1^4;
sbit valve = P1^5;

sbit t_inc = P3^5;
sbit t_dec = P3^4;
sbit fan_k = P2^7;
sbit mod_k = P1^7;
sbit on_off= P1^6;

sbit P3_2 = P3^2;

bit on_off_flag=0 , key_dispose_wait , dis_en_flag=1;
uchar tempr_set=27 , work_mode=0 , fan_mode=0 , compressor_delay=0 , dis_en_delay=dis_en_delay_set;
uchar temperature_get=0 , work_mode_fact=1,compressor_block=0;
uint timer0_extend=1000;
uchar code dis_code[30]={ 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,
                       //  0    1    2    3   4    5    6    7     8    9    a    b    c    d    e    f 
					      0x36,0x49,0x48,0x08,0x36,0x38,0x71,0x76,0x00};
					   //  ||   三    二   一  ||   L    F    H   OFF
uchar dis_buf[6]   =   {0X36,0X36,0X5b,0X07,0X00,0X00};     //段码
uchar code dis_dig[6]= {0xA0,0x90,0x88,0x84,0x82,0x81};     //位码   P2.7 connect to key --> p2.7=1

uchar code tempr_transform[165]=                            // transform AD sample to temperature  
               {99,97,95,94,93,91,89,88,87,85,84,83,81,80,79,78,77,76,75,
              //24 25 26 27 28 ... ...
				74,73,72,71,70,69,68,67,67,66,65,64,64,63,62,61,61,60,59,
				58,57,57,56,55,55,54,53,53,52,51,51,50,50,49,48,48,47,47,
				46,46,45,45,44,44,43,43,42,42,41,41,40,40,39,39,38,38,37,
				37,36,36,35,35,34,34,34,33,33,32,32,31,31,30,30,29,29,28,
				28,28,27,27,26,26,25,25,24,24,24,23,23,23,22,22,21,21,20,
				20,20,19,19,18,18,17,17,16,16,16,15,15,15,14,14,13,13,12,
				12,11,11,11,10,10,9,9,8,8,8,7,7,6,6,5,5,5,4,4,3,3,2,2,1,
				1,0,0
      //... ... 183 184
               };
           
void s_delay(uchar aaa)    //short delay
{    while (aaa>0)
       { aaa--;  aaa=aaa;}
}

/*  timer0 initialization    */
void timer0_init()
{
    TMOD= 0X01;
	TH0 = 0XFC;        //1MS
	TL0 = 0X66;
	ET0 = 1;
	TR0 = 1;
	EA  = 1;
} 

/*************   显示子程序   **************/
void display(uchar dis_bit)
{    
     P0 = 0X00;         //此句防止LED动态显示时，下一位LED将短暂的显示前一位的数值
	 if(dis_en_flag==1||on_off_flag==1)        
	     P2 = dis_dig[dis_bit];  
	 else
	     P2 = 0x80;     //显示使能关闭时  led不显示
	 P0 = dis_buf[dis_bit];
}

/****************  风扇处理     ************/
/*              执行相应的动作             */       
void fan_lsub()
{    fan_h=fan_m=1;
     fan_l=0;
}

void fan_msub()
{    fan_h=fan_l=1;
     fan_m=0;
}

void fan_hsub()
{
     fan_m=fan_l=1;
     fan_h=0;
}
   
void fan_auto()
{    if(work_mode_fact==1)      //cold
       {
         if((temperature_get-tempr_set)>5)
            fan_hsub();
         else 
            if((temperature_get-tempr_set)<=2)
                fan_lsub();
            else fan_msub();
        }  
      else 
         if(work_mode_fact==3)   //hot
           {
             if((tempr_set-5)>temperature_get)
                fan_hsub();
	         else 
	            if(tempr_set<=(temperature_get+2))		     
	                fan_lsub();
	            else fan_msub();
	        }  
         if(work_mode_fact==2)   //fan
           {
              if(temperature_get>25)  fan_hsub();
              else if(temperature_get<20)  fan_lsub();
                   else fan_msub();
            }
}
           

/*************************************************/
/*********         工作模式     ******************/
/*********      执行相应的动作   *****************/
void work_csub()                 //制冷子程序
{
     if(compressor_delay==0&&compressor_on==1)
        { compressor_on=0;
          compressor_delay=compressor_delay_s;
        }
     else
	   if(compressor_delay!=0&&compressor_on==1)
         compressor_block=1;   //3 min protect

     ext_room_fan =0;
     valve =1;
     work_mode_fact=1;
}
 
void work_hsub()        
{
     if(compressor_delay==0&&compressor_on==1)
       {  compressor_on=0;
          compressor_delay=compressor_delay_s;
       }
     else
	    if(compressor_delay!=0&&compressor_on==1)
         compressor_block=1;
     ext_room_fan =0;
     valve =0;  
	 work_mode_fact=3;

	
}

void work_fsub()
{
/*     if(compressor_delay==0&&compressor_on==0)
        { */compressor_on=1;
 /*         compressor_delay=compressor_delay_s;
        }
     else
	   if(compressor_delay!=0&&compressor_on==0)
           compressor_block=2;   //3 min protect
*/
     ext_room_fan =1;
     valve =1;
	 work_mode_fact=2;

}

void work_auto()
{  
     if((tempr_set-5)>temperature_get)
        work_hsub();
     else
        if((temperature_get>tempr_set))
            work_csub();
        else work_fsub();
}
     
void work_on_off()
{
    if(on_off_flag==0)
	   { fan_h = 1; 
		 fan_m = 1;
		 fan_l = 1;
         ext_room_fan  = 1;
		 valve = 1;

/*	     if(compressor_delay==0&&compressor_on==0)
	        {*/  compressor_on=1;	 
/*	           compressor_delay=compressor_delay_s;			   
	         }
	     else
	        if(compressor_delay!=0&&compressor_on==0)
			   compressor_block=2;   //3 min protect
*/	   }
}

/*************************************************/
/*************  温度限制子程序  ******************/
/**** 功能 用于模式改变适应温度设定范围的变化*****/
void mode_tempr_limit()   
{     switch (work_mode)
       {
           case(0):
		       if((tempr_set!=25)&&(tempr_set!=27)&&(tempr_set!=29))
		          {tempr_set=27;            //检查温度设置
			       dis_buf[3]=dis_code[tempr_set%10];
		           dis_buf[2]=dis_code[tempr_set/10];
				   }
	                                break;
           case(1):
			 	 if(tempr_set>32)                //检查温度设置是否超出范围
				   { tempr_set=32;
				     dis_buf[3]=dis_code[tempr_set%10];
			         dis_buf[2]=dis_code[tempr_set/10];
					}
				 if(tempr_set<20)
				   { tempr_set=20;
				     dis_buf[3]=dis_code[tempr_set%10];
			         dis_buf[2]=dis_code[tempr_set/10];
					}  
				                    break;
           case(2):  dis_buf[2]=dis_buf[3]=0x40;   
		                            break;
           case(3):
				  if(tempr_set>30) 
				    { tempr_set=30;
					  dis_buf[3]=dis_code[tempr_set%10];
			          dis_buf[2]=dis_code[tempr_set/10];
					}
				  if(tempr_set<14)
				   { tempr_set=14;
				     dis_buf[3]=dis_code[tempr_set%10];
			         dis_buf[2]=dis_code[tempr_set/10];
					}              break;
       }
}
      

/******************    key_get    ******************/
/******************    键码获取   ******************/
uchar key_code_get()
{   
     uchar key_code_kcg=0;
     if(t_inc==0) key_code_kcg =0x01;
     if(t_dec==0) key_code_kcg =0x02;
     if(fan_k==0) key_code_kcg =0x04;
     if(mod_k==0) key_code_kcg =0x08;
     if(on_off==0)key_code_kcg =0x10;
     return(key_code_kcg);
}

/********************  键码处理   ********************/
/*      根据得到的按键码,修改相应的寄存器            */ 
/*        显示相应的设置 但是不执行动作              */
 
void key_dispose(uchar temp_kds)
{    if(dis_en_flag==1||on_off_flag==1) 
	   {  switch(temp_kds)
	        {  case 0x01:  if(work_mode!=2)
			                   tempr_set++;                         //温度设置++
		                   if(((work_mode==1)||(work_mode==2))&&(tempr_set>32))
	  					       tempr_set=32;
						   if((work_mode==3)&&(tempr_set>30))          
						       tempr_set=30;						   						   
						   if(work_mode==0)
						       { tempr_set++;  
							        if(tempr_set>=29) tempr_set=29; //各种限制
	 						    }
						   if(work_mode!=2)
	                            { dis_buf[3]=dis_code[tempr_set%10];
			                      dis_buf[2]=dis_code[tempr_set/10]; 
				                 }                                  //显示
			                                                        break;
	 	       case 0x02:  if(work_mode!=2)
			                   tempr_set--;                        //温度设置--
		                   if((work_mode==1)&&(tempr_set<20))
	  					       tempr_set=20;
						   if(((work_mode==3)||(work_mode==2))&&(tempr_set<14))  
						       tempr_set=14;  						   						   
						   if(work_mode==0)
						       { tempr_set--;  
							        if(tempr_set<=25) tempr_set=25;  //各种限制
	 						    }
						   if(work_mode!=2)
	                            { dis_buf[3]=dis_code[tempr_set%10];
			                      dis_buf[2]=dis_code[tempr_set/10]; 
				                 }  
	                                                                 break;
	
			   case 0x04:  fan_mode++;                              //风扇模式设置
			               fan_mode%=4;	 
	                       dis_buf[1]=dis_code[0x10+fan_mode];      //模式显示
	                                                                 break;
	                                                                 
	
			   case 0x08:  work_mode++;                             //工作模式设置
			               work_mode%=4;  
	                       dis_buf[0]=dis_code[0x14+work_mode];     //显示         
	                        mode_tempr_limit();
	                                                                 break;
	
			   case 0x10:  on_off_flag=!on_off_flag;                //开关标志设置
			                                                         break;
			 }
		 key_dispose_wait = 1; 
        }
     dis_en_delay = dis_en_delay_set; 
     dis_en_flag = 1;
                  //设置按键等待处理标志位（主程序执行）
}


/***************************************************/
/********             按键执行程序         *********/
/*       根据与按键相关的寄存执行相应的动作        */
/*                      并显示                     */   
void key_exe()
{ if(on_off_flag==1)
     {
     switch (work_mode)
       {
           case(0):  work_auto();   break;
           case(1):  work_csub();   break;
           case(2):  work_fsub();   break;
           case(3):  work_hsub();   break;
       }
      switch (fan_mode)
       {
           case(0):  fan_auto();   break;
           case(1):  fan_hsub();   break;
           case(2):  fan_msub();   break;
           case(3):  fan_lsub();   break;
        }
     } 

 if(work_mode==2)                       //风扇模式时 温度设显示为 “--
     dis_buf[2]=dis_buf[3]=0x40;
 else
      { dis_buf[3]=dis_code[tempr_set%10];
        dis_buf[2]=dis_code[tempr_set/10];
	   }          
}


/*            AD采集            */
/*       输出是上一次转换值     */
/* 并且启动一次采样 供下一次读取*/
uchar ad_sample()
{    uchar ad_sample1;
     P2=0X80;              //消除显示干扰
     ad_sample1=AD_CH0;   //读取
     AD_CH0=0X00;         //启动一次次采样
     return(ad_sample1);
}
       
/*****************  温度处理   ************************/                      
/******功能： 把ad得到的温度值转换成温度值***************/
/*********** 并且把显示代码放入dis_buf中***************/ 
 
void tempr_dispose(uchar sample_temp)
{     
	    if(sample_temp>184||sample_temp<23)
	      { 
	         dis_buf[4]=dis_code[14];  
		     if(sample_temp>184)                        //如果温度 <0 或者温度传感器断路
		         dis_buf[5]=dis_code[1];                //  显示 "E1"
			 else                                       //如果温度>100   或者温度传感器短路
	             dis_buf[5]=dis_code[2];                //  显示 "E2"    
		  }
		 else
		  {  temperature_get=tempr_transform[sample_temp-24];
		     dis_buf[5]=dis_code[temperature_get%10];   //否则正常显示
		     dis_buf[4]=dis_code[temperature_get/10];
		   }	 
}

/*************** 工作模式调整 *******************/
/** 用于根据实际情况和设定情况调整实际工作模式  */
void work_adjust()
{
     if(work_mode==1)
	   {  if(tempr_set>=temperature_get)
               work_fsub();
		   else work_csub();
		}
	 if(work_mode==3)
	    {   if(tempr_set<=temperature_get)
               work_fsub();
			else work_hsub();
		 }
	  if(fan_mode==0)  fan_auto();  //自动调整风速 
	  if(work_mode==0) work_auto(); // 自动调整工作模式
      work_on_off(); 
}
    
void main()
{   
	PT0=1;          // t0高优先级
	timer0_init();
	EX0=1;
	AD_CH0=0X00;    //启动一次
	s_delay(250);
	tempr_dispose(ad_sample());
	while(1)
	 {   if(key_dispose_wait==1)              //如果有按键等待执行
	         {   key_exe();                   //执行
	             key_dispose_wait=0;			    
			  }	
         
	     if(on_off_flag==1)
		    {   work_adjust();
		        if(compressor_block!=0)                       //处理压缩机阻塞
		          {   if(compressor_delay==0&&compressor_block==1&&work_mode_fact!=2)
		                  {  compressor_on=0;  
	//	                     compressor_delay=compressor_delay_s; 
		                     compressor_block=0;
		                  }
	//	              if(compressor_delay==0&&compressor_block==2)
	//	                  {   compressor_on=1; 
	//	                      compressor_delay=compressor_delay_s;
	//	                      compressor_block=0;
	//	                  }
		          }	 
			 }
	 }
}          

/**************** 1ms 定时器中断  **********************/
void timer0_1ms() interrupt 1 using 2
{    
     TH0 = 0XFc;
     TL0 = 0X66;
     timer0_extend--;
     display(timer0_extend%6);      //display
     if(timer0_extend==0)           //1s
         {          
           tempr_dispose(ad_sample());  //得到ad值 并处理
           if(compressor_delay>0)  
                compressor_delay--;  //压缩机保护延时
           if(dis_en_delay>0)
				dis_en_delay--;
		   else dis_en_flag=0;
           timer0_extend=1000;              
          }
}

/************   exterior interrupt 0   **************/
/**********   key code get and dispose    ***********/
void key_code_get_int() interrupt 0 using 3
{
     uchar  key_code1=0 , key_code2=0;
     EX0=0;                                  //turn off exterior interrupt
     s_delay(100);
     key_code1=key_code_get();
     if(key_code1!=0)
       {  s_delay(250);
          key_code2=key_code_get();
          if(key_code1==key_code2)
             key_dispose(key_code1);  
		  while(P3_2==0);
        }
	EX0=1;
}